154181 has 2 divisors, whose sum is σ = 154182. Its totient is φ = 154180.

The previous prime is 154159. The next prime is 154183. The reversal of 154181 is 181451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96100 + 58081 = 310^2 + 241^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154181 is a prime.

It is a super-2 number, since 2×154181² = 47543561522, which contains 22 as substring.

Together with 154183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 154181.

It is not a weakly prime, because it can be changed into another prime (154183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77090 + 77091.

It is an arithmetic number, because the mean of its divisors is an integer number (77091).

2¹⁵⁴¹⁸¹ is an apocalyptic number.

It is an amenable number.

154181 is a deficient number, since it is larger than the sum of its proper divisors (1).

154181 is an equidigital number, since it uses as much as digits as its factorization.

154181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 160, while the sum is 20.

The square root of 154181 is about 392.6588850389. The cubic root of 154181 is about 53.6220754468.

The spelling of 154181 in words is "one hundred fifty-four thousand, one hundred eighty-one".